TY  - BOOK
ED  - Johny Liz Soars.
TI  - Headway teachers book: upper intermediate 
SN  - 0194335615
U1  - 421 
PY  - 1994///
CY  - New York
PB  - Oxford University  Press
KW  - Ingles
N1  - Incluye Text booklet; The tense system.--Present perfect simple and continuous.--Verb patterns.--Question forms.--Narrative tenses.--Expressing quantity.--Description.--Modal verb of deduction.--Expressing habit.--Articules
ER  -